1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1988, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <sys/param.h>
33#include <errno.h>
34#include <pwd.h>
35#include <stdio.h>
36#include <string.h>
37#include <unistd.h>
38#include "namespace.h"
39#include <pthread.h>
40#include "un-namespace.h"
41
42#include "libc_private.h"
43
44extern int		_getlogin(char *, int);
45
46char *
47getlogin(void)
48{
49	static char logname[MAXLOGNAME];
50
51	if (_getlogin(logname, sizeof(logname)) < 0)
52		return (NULL);
53	return (logname[0] != '\0' ? logname : NULL);
54}
55
56int
57getlogin_r(char *logname, size_t namelen)
58{
59	char tmpname[MAXLOGNAME];
60	int	len;
61
62	if (namelen < 1)
63		return (ERANGE);
64	logname[0] = '\0';
65
66	if (_getlogin(tmpname, sizeof(tmpname)) < 0)
67		return (errno);
68	len = strlen(tmpname) + 1;
69	if (len > namelen)
70		return (ERANGE);
71	strlcpy(logname, tmpname, len);
72	return (0);
73}
74
75/* FreeBSD 12 and earlier compat. */
76int
77__getlogin_r_fbsd12(char *logname, int namelen)
78{
79	if (namelen < 1)
80		return (ERANGE);
81	return (getlogin_r(logname, namelen));
82}
83__sym_compat(getlogin_r, __getlogin_r_fbsd12, FBSD_1.0);
84